求翻译：2011年4月24日，清华大学举行了百年校庆，海内外数万名毕业生，著名科学家杨振宁等参加了校庆活动，会上胡锦涛主席发表演讲，激励所有的老师和同学为了他们的梦想和国家的未来而努力。是什么意思？

April 24, 2011, Tsinghua University held a centennial celebration, tens of thousands of graduates at home and abroad, the famous scientist Yang attended the anniversary events, President Hu Jintao delivered a speech at the meeting, encourage all the teachers and students to their dreams and the stat

正在翻译，请等待...

On April 24, 2011, Qinghua University has held hundred years school anniversary, everywhere tens of thousands of graduates, renowned scientist Yang Zhenning and so on participated in the school anniversary activity, at the meeting President Hu Jintao have made the lecture, drove all teachers and sch

On April 24, 2011, the Tsinghua University held a Centennial, tens of thousands of graduates at home and abroad, famous scientist Yang Chen-Ning, attended the celebration activity, meeting, Hu Jintao delivered a speech, and motivate all teachers and students and strive for their dreams and the futur

正在翻译，请等待...